How can a social networking site have such a negative impact on relationships? First, it allows users to easily catch up with old flames – which can cause old feelings to surface. It’s also easy to exchange messages and start an “emotional affair” while rationalizing that you aren’t physically doing anything inappropriate.

“The initial intention may be harmless but as time progresses, intentions may begin to shift and enter dangerous territory. What started out as just getting to know a coworker can easily escalate to sending lengthy, intimate messages,” writes one blogger.

What do you think? Do you know any couples who have split up because of Facebook?